1. Introduction
Foam core structure absorbing materialIt is a kind of wave absorbing material with lightweight and low-density foam layer as sandwich structure. It not only reduces the overall mass of the material, but also has the function of adjusting surface impedance, thereby widening the effective absorption bandwidth of the material. At the same time, the foam core structure can also be combined with other sandwich structures to further improve the wave absorption performance of the material.
2. Example proof
Taking the sandwich structure microwave absorbing composite material prepared by glass fiber reinforced polymer (GFRP), foam layer and nickel plated glass fiber layer (NCF) adopted by the Advanced Institute of Technology as an example, the material meets the effective absorption of less than -10 dB in the frequency range of 6.5~17.5 GHz, and the maximum reflection loss is about -24 dB. This fully verifies that the addition of foam layer can not only reduce the material quality, but also broaden the effective absorption bandwidth, thereby improving the wave absorption performance of the material.
3. Viewpoint analysis
(1) Lightweight characteristics of foam core structure:
The sandwich layer of foam core structure absorbing material is made of lightweight and low-density foam material, so it has the characteristics of light weight. This feature enables the material to exhibit higher flexibility and efficiency in absorbing waves, enabling effective absorption in multiple frequency ranges.
(2) Broadband absorption capacity of foam core structure:
Because the foam layer can adjust the surface impedance of the material, the effective bandwidth of the material is increased. This adjustment characteristic enables the material to achieve effective absorption in various frequency ranges. For example, the sandwich structure microwave absorbing composite materials prepared by the Advanced Institute of Technology all meet the effective absorption of less than -10 dB in the range of 6.5~17.5 GHz, which further verifies the broadband absorption capacity of the foam core structure.
4. Application prospects
(1) Applied in the field of communication:
Foam core structure absorbing materialIt can reduce the reflection and scattering of electromagnetic waves and improve the quality of communication signals in the field of communication. By using absorbing materials in communication equipment and facilities, interference and attenuation of wireless signals can be effectively reduced, improving communication quality and stability.
(2) Applied in the field of drones:
Drones are subject to interference from signals such as radar, satellite navigation, and communication during navigation. The use of foam core structure absorbing materials can reduce the radar reflection cross section of the UAV, reduce the probability of signal detection, improve the stealth performance of the UAV, and increase the battle success rate.
In a word, foam core structure absorbing materials show great potential in various fields due to their lightweight characteristics and broadband absorption capacity. In applications such as communication and drones, it will play an important role in improving device performance and efficiency. With the continuous progress of technology and in-depth application, foam core structure absorbing materials will usher in a broader development prospect.
